Become Network -> DNS to MVC

[ejhernandez@…]

In menu Network-> DNS, become the given form of nameservers in a full list of nameservers. This list will be as follows:

• Ordered, first is primary, second is secondary and so on
• Not limited number

The ticket must achieve these requirements:

• Provide same functionality as non-MVC based one
• Migration script from the old gconf value one to the new MVC-based one
• Maintain the API and improve a little with new exposed methods

[ejhernandez@…]

(In [10337]) * Added DNSResolver model to handle nameserver resolvers

• Added three exposed methods to import easily name server resolvers
• Added migration script to migrate all gconf values to the new model
• Added verbosity to the migration scripts
• Updated nameserver related methods to be tested

All refs #1015

[ejhernandez@…]

(In [10338]) Improve importer to set every nameserver set, old API for DNS resolvers works with new model and added some more unit tests closes #1015 (spent 0.75)

[ejhernandez@…]

(In [10340]) Added insertPosition attribute to DNS resolver model to insert elements at the end and set the menu entry for the model refs #1015 (spent 1.25)